Device used in connection with containers for bulk material

Abstract

Device in a container for bulk material including a main part with mainly vertical walls and a converging feed-out part. In the feed-out part (3) an upwards vault mantle (7) is placed, and the mantle having a large number of openings (9) distributed over its surface, the openings permitting bulk material to pass through. The vault mantle is arranged in such a way that it can carry out oscillating movements in the container, whereby tendencies of bridge building in the container may be avoided and at the same time it is secured that the bulk material will reach the feed-out opening (4) adjacent to the feed-out zone in loose form. The vault mantle may have different configurations, e.g. the form of a lying cylinder, half-cylinder, an upwards vault dome or the form of an upwards pointing cone. The vault bottom and specially when it has the form of a cone may also be provided with projecting parts, e.g. in form of a separate rotatable tube with feed-in openings for bulk material. The oscillating movements can consist of rotative movements around an axis or of axial movements or of combinations of both forms of movement.

I claim: 
     
       1. In a device in a container for bulk material for chipped wood, pellets and similar material, said container including a main part with mainly rectangular walls, and a feed-out part for securing an even flow of material from the container, the improvement comprising a plurality of tubes arranged in parallel side by side relation in the main part of the container, said tubes having a number of openings distributed over their surfaces for permitting the passing through of bulk material, said tubes being arranged to carry the passing through of bulk material, means to provide reciprocating movements to said tubes in the container with the upper part of said tubes protruding into the main part of the container, a feeding screw arranged co-axially inside said at least one tube and means for rotating said screw within said tube. 
     
     
       2. Device according to claim 1, wherein each tube includes a said feeding screw, which is co-axial with the tube.